US5362112A - Pipe joint construction and coupling therefor - Google Patents
Pipe joint construction and coupling therefor Download PDFInfo
- Publication number
- US5362112A US5362112A US08/122,773 US12277393A US5362112A US 5362112 A US5362112 A US 5362112A US 12277393 A US12277393 A US 12277393A US 5362112 A US5362112 A US 5362112A
- Authority
- US
- United States
- Prior art keywords
- pipe
- core ring
- grooves
- pipe joint
- sections
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 230000008878 coupling Effects 0.000 title claims abstract description 23
- 238000010168 coupling process Methods 0.000 title claims abstract description 23
- 238000005859 coupling reaction Methods 0.000 title claims abstract description 23
- 238000010276 construction Methods 0.000 title claims abstract description 19
- 239000004033 plastic Substances 0.000 claims abstract description 9
- 229920003023 plastic Polymers 0.000 claims abstract description 9
- 230000004323 axial length Effects 0.000 claims description 8
- 238000003780 insertion Methods 0.000 claims description 3
- 230000037431 insertion Effects 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 229920002430 Fibre-reinforced plastic Polymers 0.000 claims 1
- 239000011151 fibre-reinforced plastic Substances 0.000 claims 1
- 230000000717 retained effect Effects 0.000 claims 1
- 238000007789 sealing Methods 0.000 claims 1
- 239000012530 fluid Substances 0.000 description 4
- 230000004075 alteration Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000013023 gasketing Methods 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229920001084 poly(chloroprene) Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 1
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L25/00—Constructive types of pipe joints not provided for in groups F16L13/00 - F16L23/00 ; Details of pipe joints not otherwise provided for, e.g. electrically conducting or insulating means
- F16L25/0018—Abutment joints
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F3/00—Sewer pipe-line systems
- E03F3/04—Pipes or fittings specially adapted to sewers
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
- E21B17/08—Casing joints
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/16—Devices for covering leaks in pipes or hoses, e.g. hose-menders
- F16L55/162—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe
- F16L55/165—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe a pipe or flexible liner being inserted in the damaged section
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S285/00—Pipe joints or couplings
- Y10S285/91—Gaskets
Definitions
- the subject invention is directed toward the art of pipe joints and, more particularly, to a pipe joint construction which can provide a smooth transition on both the interior and exterior at the junction between the joined pipe sections.
- the invention is especially suited for joining large diameter plastic pipe used in relining sewer lines and will be described with reference thereto; however, the invention is capable of broader application and could be used for joining pipes of a variety of sizes used in many environments.
- the inserted pipe have a smooth outer diameter sized to closely but freely fit within the existing line. Also, the interior of the pipe must be smooth to offer little resistance to flow.
- the subject invention provides a joint construction which satisfies the noted requirements in a highly effective and economical manner.
- a pipe joint construction which is particularly suited for joining large diameter pipe.
- the construction comprises first and second sections of the large diameter cylindrical pipe having opposed aligned end walls each provided with axially aligned annular grooves formed inwardly of each end wall circumferentially of the pipe.
- a coupling member joins the pipe sections and includes an annular ring member sized to be received in the aligned annular grooves and to extend between the first and second sections.
- the annular ring member includes a rigid annular core with a resilient elastomeric exterior covering that includes a plurality of radially extending, axially flexible protrusions located on both the radial interior and radial exterior of the rigid annular core. The protrusions are compressed between the rigid annular core and the walls of the annular grooves.
- the arrangement is such that the rigid annular core provides strength and rigidity to the joint and allows transmission of axial forces necessary for inserting the sections into a degraded sewer during relining operations.
- the resilient and compressed protrusion portions of the resilient elastomeric exterior of the coupling serve to seal the joint structure and provide a relatively significant holding force to maintain the sections joined.
- the rigid annular core of the coupling member is preferably formed from a rigid plastics material, and the protrusions on the flexible covering extend circumferentially of the core and are preferably circumferentially continuous at least adjacent the axial ends of the core.
- the rigid annular core is preferably circumferentially continuous and has an axial length so as to extend a substantial distance into each of the aligned annular grooves.
- the total axial length of the coupling member, including the core and the resilient exterior covering is at least slightly greater than the total combined axial length of the aligned annular grooves.
- the construction is such that the coupling member can be driven into position by aligning it with the pipes and moving them axially toward one another.
- the coupling when used in relining degraded sewers and the like, can be used to sequentially join individual pipe sections with the preceding pipe section and then drive the joined sections together and into the degraded sewer line.
- the resulting joint structure has no protrusions extending away from the interior or the exterior surfaces of the pipe. That is, the entire assembly is received within the two aligned annular end grooves to allow the exterior and interior of the pipe to remain smooth and continuous. This is particularly desirable when the assembly is used in a relining operation wherein the pipe sections are inserted into an existing line. Additionally, the absence of any structure extending into the interior flow area of the pipe assures that the resistance to fluid flow is not adversely affected by the joint structure.
- the subject invention has for its primary object the provision of an improved joint structure which is particularly suited for joining large diameter pipes as used in sewer relining operations.
- Yet another object of the invention is the provision of a joint structure of the general type described which can be assembled merely by applying axial load forces to the pipe sections.
- a further object of the invention is to provide a joint structure of the type under consideration wherein the joint seals the pipes against fluid leakage and also is capable of resisting axial force loadings of the type necessary for sewer relining operations.
- a still further object is the provision of a coupling of the type described which is economical and comparatively easy to install.
- FIG. 1 is a side elevational view of pipe sections joined using a joint structure formed in accordance with the subject invention (a portion of the pipe ends have been broken away to show the interior details more clearly);
- FIG. 2 is a greatly enlarged view of the circled area of FIG. 1;
- FIG. 3 is an enlarged view showing the joint structure in an aligned but disassembled position
- FIG. 1 shows the overall arrangement of a joint structure 10 used to join aligned sections 12 and 14 of large diameter plastic pipe of the type used in sewer relining operations.
- the pipe sections 12 and 14 could be of many types but, in the subject embodiment, comprise a spiral wound, extruded pipe form of the type shown and described in U.S. Pat. No. 3,926,223, issued Dec.
- the joint structure 10 is arranged and designed so as to hold the pipe sections 12 and 14 in aligned relationship against axial separation and to allow substantial axial compressive forces generated during relining operations to be transmitted between the sections.
- the construction under consideration comprises aligned circumferentially continuous end grooves 16 and 18 formed respectively in the ends of sections 12 and 14.
- the grooves 16 and 18 could be formed in a variety of different manners but are preferably formed in the subject embodiment by removing interconnecting transverse walls in the pipe sections through a routing operation.
- the resulting axially inward extending grooves 16, 18 thus have relatively smooth walls and the inner and outer exterior walls of the pipe sections, for example, 12a and 12b are not damaged by the formation of the groove and the integrity of the pipe section is maintained.
- the core 22 could, of course, be formed from other materials and could under certain circumstances be circumferentially discontinuous so that it could be radially expanded or contracted to better align with the grooves if desired.
- the total radial thickness of the ring is, as shown, substantially less than the radial width of the groves 16 and 18.
- member 26 is such that it can be resiliently distended to engage about the exterior of the core 22 to the assembled position shown in FIG. 2.
- the combined or total radial thickness of member 20 is such that when it is driven into position in the aligned grooves 16 and 18, the protrusions must be radially compressed as shown in FIG. 3. This radial compression causes the protrusions and, in turn, members 26 and 22 to be firmly locked into position and tightly engaged in the grooves 16 and 18. As a result, a fluid seal is achieved and the joint is capable of withstanding substantial axial loads tending to disassembly the joint.
- the rigid core 22 serves to allow substantial axial compressive forces to be conducted between the aligned sections as required during sewer relining operations. To assure that the insertion forces applied are transmitted through the coupling 26 and not by engagement of the ends of walls 12a, 12b with 14a and 14b, the total axial length of coupling 26 is at least slightly greater than the combined axial depth of grooves 16, 18.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Fluid Mechanics (AREA)
- Environmental & Geological Engineering (AREA)
- Geochemistry & Mineralogy (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Public Health (AREA)
- Water Supply & Treatment (AREA)
- Joints With Sleeves (AREA)
Abstract
Description
Claims (6)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/122,773 US5362112A (en) | 1993-09-16 | 1993-09-16 | Pipe joint construction and coupling therefor |
CA002132244A CA2132244C (en) | 1993-09-16 | 1994-09-16 | Improved pipe joint construction and coupling therefor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/122,773 US5362112A (en) | 1993-09-16 | 1993-09-16 | Pipe joint construction and coupling therefor |
Publications (1)
Publication Number | Publication Date |
---|---|
US5362112A true US5362112A (en) | 1994-11-08 |
Family
ID=22404686
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US08/122,773 Expired - Lifetime US5362112A (en) | 1993-09-16 | 1993-09-16 | Pipe joint construction and coupling therefor |
Country Status (2)
Country | Link |
---|---|
US (1) | US5362112A (en) |
CA (1) | CA2132244C (en) |
Cited By (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE29500226U1 (en) * | 1995-01-07 | 1995-02-23 | Siegburger Betonwerk Bellinghausen GmbH & Co. KG, 53757 Sankt Augustin | Sewer pipes with means for sealing them to one another |
US5709411A (en) * | 1996-04-22 | 1998-01-20 | The Lamson & Sessions Co. | Draft compensating coupling member |
WO1998036207A1 (en) * | 1997-02-14 | 1998-08-20 | Thames Water Utilities Limited | An end connector |
DE19718282A1 (en) * | 1997-05-01 | 1998-11-05 | Johann Russ | Arrangement for connecting pipes |
US6113158A (en) * | 1998-05-21 | 2000-09-05 | The Lamson & Sessions Co. | Pipe joint coupling |
US6131954A (en) * | 1996-05-28 | 2000-10-17 | Campbell; Steve | Weldable couple for electrofusion coupling of profile wall thermoplastic pipes without a separate coupler |
WO2000075538A1 (en) * | 1999-06-03 | 2000-12-14 | Caterpillar Inc. | A fluid passage seal |
US6322653B1 (en) * | 1996-10-09 | 2001-11-27 | Oy Kwh Pipe Ab | Method for joining spiral wound pipes |
EP1072828A3 (en) * | 1999-07-29 | 2002-05-29 | Poppe GmbH & Co. KG | Sealing ring |
US6521072B1 (en) | 1996-05-28 | 2003-02-18 | C&S Intellectual Properties, Llc | Method of coupling profile wall thermoplastic pipes |
US20040119285A1 (en) * | 2002-09-27 | 2004-06-24 | Foos George J. | Pipe joint and couplers |
US20040173975A1 (en) * | 2002-12-10 | 2004-09-09 | Robert Hirst | Sealing arrangements |
US20070018453A1 (en) * | 2005-07-20 | 2007-01-25 | Amaia Iturralde | Coupling for an outlet conduit of a washing tank of a washing machine |
US20080231047A1 (en) * | 2007-03-23 | 2008-09-25 | Airbus Deutschland Gmbh | Pipe Connecting Device |
US20100171301A1 (en) * | 2009-01-02 | 2010-07-08 | Unisert Multiwall Systems, Inc. | Multiwall pipe lip seal joint |
US20100264644A1 (en) * | 2009-04-16 | 2010-10-21 | Royal Group Inc. | Fitting for corrugated conduit |
USD663697S1 (en) | 2009-06-03 | 2012-07-17 | Royal Group Inc. | Conduit fitting ring |
JP2013119756A (en) * | 2011-12-08 | 2013-06-17 | Hayakawa Rubber Co Ltd | Water cut-off device for concrete structure |
US9777579B2 (en) | 2012-12-10 | 2017-10-03 | General Electric Company | Attachment of composite article |
US9797257B2 (en) | 2012-12-10 | 2017-10-24 | General Electric Company | Attachment of composite article |
Citations (22)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL91304C (en) * | ||||
US9737A (en) * | 1853-05-17 | Improvement in track-clearers to harvesters | ||
US52010A (en) * | 1866-01-16 | Improved aqueduct-coupling | ||
US249594A (en) * | 1881-11-15 | Pipe-joint | ||
US679399A (en) * | 1901-05-06 | 1901-07-30 | John Smith | Wall socket for water or other pipes. |
US795976A (en) * | 1904-09-15 | 1905-08-01 | Austin T Herrick | Pipe-coupling. |
US1940074A (en) * | 1930-10-13 | 1933-12-19 | Burmeister Joachim Hein Gustav | Joint for pipes and the like |
DE619385C (en) * | 1932-05-20 | 1935-09-30 | Rudolf Kuerth | Gas and watertight connection of pipes and fittings |
US2182995A (en) * | 1938-04-18 | 1939-12-12 | Robert K Pepper | Expansion pipe joint |
US2314328A (en) * | 1940-10-28 | 1943-03-23 | Frank C Enderle | Flue or vent pipe |
NL6405294A (en) * | 1963-05-16 | 1964-11-17 | ||
CH392170A (en) * | 1960-05-23 | 1965-05-15 | Peck Rolf | Connection of two similar elements |
US4202568A (en) * | 1975-09-25 | 1980-05-13 | Ab Gustavsberg | Tube joint |
US4229028A (en) * | 1978-12-20 | 1980-10-21 | Universal Sewer Pipe Company | Pipe coupler |
US4326737A (en) * | 1979-02-23 | 1982-04-27 | Georg Fischer Aktiengesellschaft | Tube coupling assembly |
US4400019A (en) * | 1981-04-22 | 1983-08-23 | Unisert Systems, Inc. | Multilayer pipe joint |
US4452462A (en) * | 1983-10-06 | 1984-06-05 | Gray Tool Company | Temperature resistant joint packing with E-shaped spring seal |
US4614371A (en) * | 1983-08-03 | 1986-09-30 | Firma Carl Freudenberg | Ring |
US4796669A (en) * | 1981-07-10 | 1989-01-10 | Duratron Systems Limited | Product for relining sewers and water pipes |
US4819972A (en) * | 1986-01-07 | 1989-04-11 | Gary Champa | Grip joints for plastic ducts |
USRE33199E (en) * | 1983-10-06 | 1990-04-17 | Vetco Gray Inc. | Temperature resistant joint packing with E-shaped spring seal |
EP0366637A1 (en) * | 1988-10-24 | 1990-05-02 | Abb Fläkt Oy | A joint for air-conditioning units |
-
1993
- 1993-09-16 US US08/122,773 patent/US5362112A/en not_active Expired - Lifetime
-
1994
- 1994-09-16 CA CA002132244A patent/CA2132244C/en not_active Expired - Fee Related
Patent Citations (22)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9737A (en) * | 1853-05-17 | Improvement in track-clearers to harvesters | ||
US52010A (en) * | 1866-01-16 | Improved aqueduct-coupling | ||
US249594A (en) * | 1881-11-15 | Pipe-joint | ||
NL91304C (en) * | ||||
US679399A (en) * | 1901-05-06 | 1901-07-30 | John Smith | Wall socket for water or other pipes. |
US795976A (en) * | 1904-09-15 | 1905-08-01 | Austin T Herrick | Pipe-coupling. |
US1940074A (en) * | 1930-10-13 | 1933-12-19 | Burmeister Joachim Hein Gustav | Joint for pipes and the like |
DE619385C (en) * | 1932-05-20 | 1935-09-30 | Rudolf Kuerth | Gas and watertight connection of pipes and fittings |
US2182995A (en) * | 1938-04-18 | 1939-12-12 | Robert K Pepper | Expansion pipe joint |
US2314328A (en) * | 1940-10-28 | 1943-03-23 | Frank C Enderle | Flue or vent pipe |
CH392170A (en) * | 1960-05-23 | 1965-05-15 | Peck Rolf | Connection of two similar elements |
NL6405294A (en) * | 1963-05-16 | 1964-11-17 | ||
US4202568A (en) * | 1975-09-25 | 1980-05-13 | Ab Gustavsberg | Tube joint |
US4229028A (en) * | 1978-12-20 | 1980-10-21 | Universal Sewer Pipe Company | Pipe coupler |
US4326737A (en) * | 1979-02-23 | 1982-04-27 | Georg Fischer Aktiengesellschaft | Tube coupling assembly |
US4400019A (en) * | 1981-04-22 | 1983-08-23 | Unisert Systems, Inc. | Multilayer pipe joint |
US4796669A (en) * | 1981-07-10 | 1989-01-10 | Duratron Systems Limited | Product for relining sewers and water pipes |
US4614371A (en) * | 1983-08-03 | 1986-09-30 | Firma Carl Freudenberg | Ring |
US4452462A (en) * | 1983-10-06 | 1984-06-05 | Gray Tool Company | Temperature resistant joint packing with E-shaped spring seal |
USRE33199E (en) * | 1983-10-06 | 1990-04-17 | Vetco Gray Inc. | Temperature resistant joint packing with E-shaped spring seal |
US4819972A (en) * | 1986-01-07 | 1989-04-11 | Gary Champa | Grip joints for plastic ducts |
EP0366637A1 (en) * | 1988-10-24 | 1990-05-02 | Abb Fläkt Oy | A joint for air-conditioning units |
Cited By (28)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE29500226U1 (en) * | 1995-01-07 | 1995-02-23 | Siegburger Betonwerk Bellinghausen GmbH & Co. KG, 53757 Sankt Augustin | Sewer pipes with means for sealing them to one another |
US5709411A (en) * | 1996-04-22 | 1998-01-20 | The Lamson & Sessions Co. | Draft compensating coupling member |
US6131954A (en) * | 1996-05-28 | 2000-10-17 | Campbell; Steve | Weldable couple for electrofusion coupling of profile wall thermoplastic pipes without a separate coupler |
US6521072B1 (en) | 1996-05-28 | 2003-02-18 | C&S Intellectual Properties, Llc | Method of coupling profile wall thermoplastic pipes |
US6322653B1 (en) * | 1996-10-09 | 2001-11-27 | Oy Kwh Pipe Ab | Method for joining spiral wound pipes |
AU745718C (en) * | 1997-02-14 | 2003-01-23 | Thames Water Utilities Limited | An end connector |
WO1998036207A1 (en) * | 1997-02-14 | 1998-08-20 | Thames Water Utilities Limited | An end connector |
AU745718B2 (en) * | 1997-02-14 | 2002-03-28 | Thames Water Utilities Limited | An end connector |
DE19718282A1 (en) * | 1997-05-01 | 1998-11-05 | Johann Russ | Arrangement for connecting pipes |
US6113158A (en) * | 1998-05-21 | 2000-09-05 | The Lamson & Sessions Co. | Pipe joint coupling |
WO2000075538A1 (en) * | 1999-06-03 | 2000-12-14 | Caterpillar Inc. | A fluid passage seal |
EP1072828A3 (en) * | 1999-07-29 | 2002-05-29 | Poppe GmbH & Co. KG | Sealing ring |
US20040119285A1 (en) * | 2002-09-27 | 2004-06-24 | Foos George J. | Pipe joint and couplers |
US7011345B2 (en) | 2002-09-27 | 2006-03-14 | The Lamson & Sessions Co. | Pipe joint and couplers |
US6926284B2 (en) * | 2002-12-10 | 2005-08-09 | Alstom Technology Ltd. | Sealing arrangements |
US20040173975A1 (en) * | 2002-12-10 | 2004-09-09 | Robert Hirst | Sealing arrangements |
US20070018453A1 (en) * | 2005-07-20 | 2007-01-25 | Amaia Iturralde | Coupling for an outlet conduit of a washing tank of a washing machine |
US7490869B2 (en) * | 2005-07-20 | 2009-02-17 | Coprecitec, S.L. | Coupling for an outlet conduit of a washing tank of a washing machine |
US20080231047A1 (en) * | 2007-03-23 | 2008-09-25 | Airbus Deutschland Gmbh | Pipe Connecting Device |
US7748752B2 (en) * | 2007-03-23 | 2010-07-06 | Airbus Deutschland Gmbh | Pipe connecting device |
US7942422B2 (en) * | 2009-01-02 | 2011-05-17 | Unisert Multiwall Systems, Inc. | Multiwall pipe lip seal joint |
US20100171301A1 (en) * | 2009-01-02 | 2010-07-08 | Unisert Multiwall Systems, Inc. | Multiwall pipe lip seal joint |
US20100264644A1 (en) * | 2009-04-16 | 2010-10-21 | Royal Group Inc. | Fitting for corrugated conduit |
US8056938B2 (en) | 2009-04-16 | 2011-11-15 | Royal Group Inc. | Fitting for corrugated conduit |
USD663697S1 (en) | 2009-06-03 | 2012-07-17 | Royal Group Inc. | Conduit fitting ring |
JP2013119756A (en) * | 2011-12-08 | 2013-06-17 | Hayakawa Rubber Co Ltd | Water cut-off device for concrete structure |
US9777579B2 (en) | 2012-12-10 | 2017-10-03 | General Electric Company | Attachment of composite article |
US9797257B2 (en) | 2012-12-10 | 2017-10-24 | General Electric Company | Attachment of composite article |
Also Published As
Publication number | Publication date |
---|---|
CA2132244A1 (en) | 1995-03-17 |
CA2132244C (en) | 1999-01-26 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: LAMSON & SESSIONS CO., THE, OHIO Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:HAMILTON, LARRY J.;HAWKINGS, THOMAS W.;SHORTMAN, RICHARD P.;REEL/FRAME:006702/0631;SIGNING DATES FROM 19930831 TO 19930907 |
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STCF | Information on status: patent grant |
Free format text: PATENTED CASE |
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